Optical module

a technology of optical modules and shields, applied in the direction of electromagnetic transceivers, semiconductor laser structural details, radio frequency controlled devices, etc., can solve the problem of difficult to provide an optical module with shields b>16/b>
US20070264022A1Inactive Publication Date: 2007-11-15FUJITSU LTD
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
FUJITSU LTD
Publication Date
2007-11-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

In an optical module in which a transmitter and a receiver that respectively outputs and receives optical signals are stored in a casing, the transmitter and the receiver are connected to a common power line and to a common ground line, and a ferrite bead is arranged on the ground line in the receiver. The ferrite bead absorbs a high-frequency current component out of components in an electric signal passing through the ground line on which the ferrite bead is arranged. An inductance component that evolves on a ground line and a power line of a light receiving element and oscillation of a series resonance circuit that is formed of a capacitance component of the light receiving element are suppressed to reduce crosstalk.
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Description

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to an optical module in which an optical signal transmitter and an optical signal receiver are integrated.

[0003] 2. Description of the Related Art

[0004] The Internet traffic using the internet protocol (IP), which has spread rapidly in recent years, offers large-capacity transmission services by employing an optical fiber network for a transmission line.

[0005] Meantime, an optical transceiver for transmitting and receiving optical signals has been reduced in size as the mounting density of the device has been becoming higher and higher. Such an optical transceiver has a problem of crosstalk in which a signal passing through a transmitter leaks into a receiver adjacent to the transmitter to produce noises, etc. Some techniques have been disclosed as measures against crosstalk, which include a technique of attaching an electric wave absorber to crosstalk electric wave generation spot o...

Claims

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